Brain evolution and Archaeopteryx.
D000220:Adaptation, Biological; D000717:Anatomy, Comparative; D000818:Animals; D005075:Biological Evolution; D001717:Birds / Q000033:anatomy & histology*; D001835:Body Weight; D001921:Brain / Q000033:anatomy & histology*; D009929:Organ Size; D010163:Paleontology; D012104:Reptiles